bug#35085: Emacs is not reproducible

[Bone Baboon]

Emacs 27.2 is not reproducible.

`guix describe` outputs:

```
Generation 24   May 12 2021 18:06:24    (current)
  guix d6aeebb
    repository URL: https://git.savannah.gnu.org/git/guix.git
    branch: master
    commit: d6aeebb23639258311fdfb9dbf5f903079fde51a
```

`guix challenge emacs` outputs:

```
/gnu/store/c52rwsavrj62dc50y599zi215ibh6a5h-emacs-27.2 contents differ:
  local hash: 1d2cwadp5dhjmaw7ai3jnp306iqqs89dw5gm793j84wk0sxpyvhz
  https://ci.guix.gnu.org/nar/lzip/c52rwsavrj62dc50y599zi215ibh6a5h-emacs-27.2: 
1ny8qvr5aha5ffm4mfh70b37512vxkayxq1nd25hsadpfyc19wj5
  differing files:
    /libexec/emacs/27.2/i686-pc-linux-gnu/emacs.pdmp
    /share/emacs/27.2/lisp/eshell/esh-cmd.elc
    /share/emacs/27.2/lisp/net/tramp.elc
    /share/emacs/27.2/lisp/net/tramp-ftp.elc
    /share/emacs/27.2/lisp/net/tramp-gvfs.elc
    /share/emacs/27.2/lisp/gnus/mm-extern.elc
    /share/emacs/27.2/lisp/gnus/gnus-registry.elc
    /share/emacs/27.2/lisp/gnus/nnmairix.elc
    /share/emacs/27.2/lisp/gnus/nnir.elc
    /share/emacs/27.2/lisp/vc/ediff-util.elc
    /share/emacs/27.2/lisp/cedet/semantic/util.elc
    /share/emacs/27.2/lisp/cedet/semantic/texi.elc
    /share/emacs/27.2/lisp/calendar/cal-mayan.elc
    /share/emacs/27.2/lisp/calendar/cal-persia.elc
    /share/emacs/27.2/lisp/calendar/cal-tex.elc
    /share/emacs/27.2/lisp/org/org-agenda.elc
    /share/emacs/27.2/lisp/org/ox-odt.elc
    /share/emacs/27.2/lisp/mh-e/mh-junk.elc

1 store items were analyzed:
  - 0 (0.0%) were identical
  - 1 (100.0%) differed
  - 0 (0.0%) were inconclusive
```